Abstract:
Medical devices and methods for making and using medical devices are disclosed. An example medical device may include a guide extension catheter. The guide extension catheter may include a proximal member having a proximal end, a distal end, and a proximal diameter. The guide extension catheter may additionally include a collar member attached to the distal end of the proximal member, the collar member comprising a base portion and one or more ribs connected to the base portion and extending distally away from the base portion. In still some additional embodiments, the guide extension catheter may further include a distal sheath member attached to the collar member, the distal sheath member having a distal diameter larger than the proximal diameter.
Abstract:
Methods and devices (e.g., for nerve modulation) may include at least one thermistor and a balloon having a balloon wall. In one or more embodiments, the medical device is configured and arranged to transfer heat to the medical device surroundings. In one or more embodiments, the at least one thermistor is a portion of a thermistor array disposed on the balloon wall, the thermistor array including a plurality of thermistors and operatively engaged with a source of electric current. In one or more embodiments, the device includes at least one flexible circuit mounted on the outer surface of the expandable balloon, the at least one flexible circuit including at least one temperature-sensing device that includes at least one thermistor, wherein at least a portion of a conductive layer is electronically coupled to the thermistor, with the proviso that no electrode is associated with the conductive layer.
Abstract:
Systems for the delivery of endoluminal devices are disclosed. An illustrative system may include a delivery sheath having an inner sheath and an outer sheath. The delivery sheath may be configured to restrain a stent in a compressed delivery configuration. The outer sheath may cover the entire length of the stent and the inner sheath may cover a portion of the length of the stent.
Abstract:
Catheter systems and methods for determining blood flow rates based on speed of sound measurements. The catheter may include a lumen extending between a proximal end of the catheter and a distal end of the catheter. The catheter may include fluid infusion openings at the distal end region of the catheter that are configured to permit the indicator fluid to exit the catheter from the lumen. The catheter system may include a guidewire having one or more sensors thereon for sensing speed of sound in a body vessel lumen and/or in a lumen of the catheter. The sensors may sense a sound sent through the catheter to the body vessel lumen. A blood flow rate may be calculated based on the measured speeds of sound.
Abstract:
Guide extension catheters and methods of manufacturing and using guide extension catheters are disclosed. An example guide extension catheter may include a distal sheath having a proximal opening, a distal opening, and a central lumen extending therebetween. The guide extension catheter may also include a proximal shaft having an outer diameter smaller than an outer diameter of the distal sheath, the proximal shaft including a distal opening. The guide extension catheter may also include a coupling member for securing the distal sheath to the proximal shaft. The coupling member may include a distal portion attached to the distal sheath and a proximal portion disposed within the distal opening of the proximal shaft.
Abstract:
Medical devices and methods for making and using medical devices are disclosed. An example medical device may include a guide extension catheter. The guide extension catheter may include a proximal member having a proximal outer diameter. A distal sheath member may be attached to the proximal member. The distal sheath member may have a proximal sheath portion and a distal sheath portion. The proximal sheath portion may have an outer diameter greater than the proximal outer diameter. The proximal sheath portion may have a first cross-sectional profile. The distal sheath portion may have a second cross-sectional profile different from the first cross-sectional profile.
Abstract:
Embodiments of the disclosure provide an ablative system for nerve modulation through wall of a blood vessel. The ablative catheter system includes an elongate member having a proximal end and a distal end, a number of electrode elements, an expansion mechanism. The electrode elements are finger-like structures mounted at their proximal ends for pivotal rotation radially outward from the longitudinal axis of the elongate member from a collapsed state. Each electrode element having inner and an outer surface with an electrode portion connected to a source of electrical energy and an insulated portion and a slope surface forming the proximal portion of the inner surface, sloping outward from the longitudinal axis of the elongate member, and a tip portion at the distal portion of the inner surface, angled toward the longitudinal axis of the elongate member. The electrode element inner surfaces in the collapsed state define a central cavity.
Abstract:
Medical devices for nerve modulation through the wall of a blood vessel are disclosed. The medical device may include an elongate member having a proximal end and a distal end. A hollow ablation member may be disposed at the distal end of the elongate member and includes a number of electrodes positioned on its outer surface. The ablation member may be configured to shift between a collapsed position and an expanded position such that that a portion of the ablation member can be brought into contact with the wall of the blood vessel or placed adjacent to the wall of the blood vessel. The ablation member may also be retractable from the blood vessel treatment site.
Abstract:
An implant for occluding a left atrial appendage may include an expandable framework configured to shift between a collapsed configuration and an expanded configuration, wherein the expandable framework includes an attachment point configured to secure the expandable framework to a delivery device, and an occlusive element disposed on a proximal portion of the expandable framework, wherein the occlusive element covers the attachment point.
Abstract:
An implant for occluding a left atrial appendage may include an expandable framework configured to shift between a collapsed configuration and an expanded configuration, wherein the expandable framework includes an attachment point configured to secure the expandable framework to a delivery device, and an occlusive element disposed on a proximal portion of the expandable framework, wherein the occlusive element covers the attachment point.